Watermelon rind contains carbohydrates, crude protein, crude fat, crude fiber, chlorophyll and other nutrients, but also contains carotene, thiamin, riboflavin, niacin, ascorbic acid and other vitamins and mineral salts such as calcium, phosphorus, iron, cool, sweet, can be used to clear the summer heat and quench the thirst, diuretic, used for summer heat and thirst, urination, edema, mouth and tongue sores.